#include<iostream>
#include<vector>
using namespace std;

int main(){
    vector<int>v;
    v.push_back(1);
    v.push_back(2);
    v.push_back(3);
    v.erase(v.begin());
    for(int i=0;i<v.size();i++)
        cout<<v[i]<<" ";
}